The False Son, Unpurified

As an additional cost to cast this spell- Exile two cards from your graveyard each with mana
value 5 or more.
Trample, Infect
When this enters the battlefield, Lockdown each other permanent. (To Lockdown a permanent, tap it, then it phases out for 3 turns. When it phases back in, it enters tapped with 2 stun counters on it.)